... :10*10mm-400*400mm 2.thickness:1.0mm-25mm 4.Satndard: BS1387,EN10219,ASTM ... Steel Square Pipe1.size:10*10mm-400*400mm2.thickness:1.0mm-25mm4.Satndard: BS1387,EN10219,ASTM A533.length: ... BS1387,ASTM A53, ASTM A106, EN10219MaterialQ195,Q215,Q235,Q345, 20#, A53 A/B, A106 B/C, St37, St52Outer diameter10 ... *10~400*400mmWall thickness1.0~25mm Length5.8m, 6m, 9m, 12m, or as ...